ATSSA TRAFFIC CONTROL SUPERVISOR RE-CERTIFICATION (MISSING SOME BASICS) EXAM QUESTIONS AND CORRECT DETAILED ANSWERS A+ GRADED

K
C
LO
YC
D
U



ATSSA TRAFFIC CONTROL SUPERVISOR
ST




RE-CERTIFICATION (MISSING SOME
BASICS) EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS A+
GRADED

, L=(WS²)/60 for 40 MPH or less,
L=WS for 45 MPH or more - ANS Formula for Min. taper length

The off peak 85th percentile. Which is the speed at or below which 85% of vehicles travel
operating speed in free flow conditions - ANS speed used in formulas should be

125' - ANS Distance of L for 25 MPH with 12' Lane width




K
245' - ANS Distance of L for 35 MPH with 12' Lane width




C
540' - ANS Distance of L for 45 MPH with 12' Lane width

660' - ANS Distance of L for 55 MPH with 12' Lane width




LO
780' - ANS Distance of L for 65 MPH 12' Lane width

L Minimum - ANS Merging Taper Length
YC
1/2 L Minimum - ANS Shifting Taper Length

1/3 L Minimum - ANS Shoulder Taper Length

50'-100' regardless of speed
6 devices 10'-20' apart - ANS One-Lane, Two-Way Taper (Flagger taper) Length and number
D

of devices

50'-100' per lane - ANS Downstream taper Length
U


2L - ANS Tangent distance (between tapers)
ST




1/2L - ANS Tangent distance before shifting taper

Buffer Space
Work Space
Traffic Space - ANS Activity Area Sub-components (3)

Recovery Area for errant vehicles: Forgiving design
Protects workers and Motorists
Always completely empty or clear
No vehicles, truck-mounted attenuator, equipment, or materials